42. f3f4 [%c_effect f4;square;f4;type;GreatFind;persistent;true] 42... e5f4 [%c_effect f4;square;f4;type;Inaccuracy;persistent;true] Carlsen goes down quickly. 43. g3f4  43... d7b7 [%c_effect b7;square;b7;type;Mistake;persistent;true] 44. f4f5 